Electric Field Strength | MCQs
مثبت چارجز کے ذریعہ تیار کردہ ڈائی الیکٹرک فیلڈ ______؟
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A. Radially inward
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B. None of these
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C. Radially outward
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D. Zero
Explanation
The electric field due to a positive charge points away from the charge, i.e., radially outward.
Field lines show the direction a positive test charge would move.
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A. Parallel to both the field and the dipole moment
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B. Parallel to the field and perpendicular to the dipole moment
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C. Parallel to the dipole moment and perpendicular to the field
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D. Perpendicular to both the field and the dipole moment
Explanation
When a dipole with dipole moment p is placed in an external electric field E, the torque experienced by the dipole is given by:
τ=p×E
This is a vector cross product, so:
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